Speed Control of Stepper Motor Using 8051 Microcontroller

Blood vessel length, when increased causes more friction or resistance thus making it more difficult for blood to flow through the vessel. In summation, increasing blood vessel length inversely effects flow rate but decreasing flow rate. My prediction was that an increase in blood vessel length would inversely effect blood flow. As evidenced in this experiment, with the increase of the blood vessel length, there was a decrease in blood flow.

Processor: A computer processer, otherwise known as the CPU (Central Processing Unit) is a part of the computer that receives input and decides that the output will be. Many modern CPUs are capable of processing trillions of calculations per second. The speed of a processor measured by how many operations a CPU can do in one second; this is done in MHz or GHz (Megahertz or Gigahertz). A processer with the speed of 1 MHz does 1,000,000 operations per second, and a 1GHz processer does 1,000,000,000 operations per second. This is known as the clock speed.

Generally processes can be described as I/O bound or CPU bound. I/O bound spends more time in doing I/O operations rather than other computations. CPU bound is contrast to I/O bound, which spends time doing all other

Cache memory is the fastest memory outside of the CPU, runs at 10-30 ns per access.

Dhrystone is especially designed to estimate integer performance of a processor based systems. A particular dhrystone score mentions number of times a fundamental function of a dhrystone source code is executed per second. Better this score is, the better is the performance of a processor. To calculate time taken by a dhrystone fundamental function, dhrystone uses standard “times(2)” function by default. However, “times(2)” provides time values in terms of processor clocks consumed. To have this value in seconds dhrystone also requires specification of clock rate used by a processor. Therefore, it is a convention to provide dhrystone score with a clock rate. However, there is no need of specifying clock rate, if the time calculations are performed using standard “time(NULL)” function. For emulators, time calculations are done using standard “time(NULL)” function. Hence, in this report no clock rates are specified with dhrystone scores associated with

Short-term: First it selects a process that’s already in memory and ready to execute. Then it allocates the CPU to it.

means by the fourth unit it will take 80% of the time of the second and the eighth unit will take

The objective of this lab is to be able to understand how the CPU functions work, as well as understanding machine and assembly language.

seconds. That’s the distance above or below the center line that connects the 3 and the 9.

The following table shows how the instructions that this processor uses can be interpreted in the RTL:

It involves a reference to a sequence of steps or events and the allotted time for each one.

The heart rate, the cardiac output and the blood pressure change to different degrees of bodily activity. The heart rate slows and cardiac output falls when demands on bodily systems are less high. However the opposite is true when demands on the bodily systems are high, the heart rate

Assembly language uses a mnemonic to represent each low-level machine operation or opcode. Some opcodes require one or more operands as part of the instruction, and most

When a CPU is composed of two or more processors, each one is referred to as a(n) ________.

* Establish a task time. Task time is the average production time allowing for each unit of demand and is calculated by taking the total operating time available during a period and dividing it by the number of units demanded by the customer during that period. Task time